(CN) – Veterans won another court order requiring the U.S. Department of Veterans Affairs to hand over more documents about its Cold War-era drug experiments on thousands of Vietnam veterans.

U.S. Magistrate Judge Jacqueline Scott Corley in Oakland, Calif., said the documents requested were “squarely relevant” to the claim that the government failed to adequately notify veterans of the chemicals they were exposed to and what that exposure might do to their health.

The Army and the CIA, with the help of Nazi scientists, used at least 7,800 veterans as human guinea pigs for testing the effects of up to 400 types of drugs and chemicals, including mescaline, LSD, amphetamines, barbituates, mustard gas and nerve agents, the Vietnam Veterans of America and individual soldiers claim in a 2009 class action.

The government covered up the true nature of its experiments, which began in the 1950s under code names such as “Bluebird,” “Artichoke” and “MKUltra.”

In “Project Paperclip,” the Army and CIA allegedly recruited Nazi scientists to help test various psychochemicals and develop a new truth serum using its own veterans as test subjects.

“Over half of these Nazi recruits had been members of the SS or Nazi Party,” according to the class action. “The ‘Paperclip’ name was chosen because so many of the employment applications were clipped to immigration papers.”

Veterans say the government was trying to develop and test substances that could trigger mind control, confusion, euphoria, altered personality, unconsciousness, physical paralysis, illogical thinking and mania, among other effects.